Datacenter Sites in Madison County, Iowa
Madison County has 22 scored datacenter candidate sites averaging 65.0/100 DC Readiness, with a catalogued aggregate of 7,900 MW. FEMA rates local natural-hazard risk as "Relatively Moderate". The county has a datacenter tax incentive on record.
22
Candidate sites
65.0/100
Avg DC Readiness
7,900 MW
Catalogued capacity
theoretical aggregate
Relatively Moderate
Hazard rating
Site-selection context for Madison County
Yessales_tax_exemption
Datacenter tax incentive
10.61¢/kWh
Commercial electricity
6.98¢/kWh
Industrial electricity
9
Fiber providers
Low
Water stress
$7,700
Land price / acre
900
Cooling degree days
6,500
Heating degree days
48°F
Mean annual temp
Incentive detail: Sales tax exemption on DC equipment for $1M+ investments; property tax phase-in for new construction.
By site type
Top datacenter sites in Madison County
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| BOONEVILLE | Substation-Adjacent | 345 kV | 600 MW | 2.8 yrs | 65.8 |
| MADISON COUNTY | Substation-Adjacent | 345 kV | 600 MW | 2.8 yrs | 63.4 |
| OZ Madison | Greenfield | — | — | 1.4 yrs | 59.9 |
| Greenfield (MADISON COUNTY - BOONEVILLE) | Greenfield | 345 kV | 600 MW | 2.8 yrs | 58.6 |
| Greenfield (UNKNOWN137755 - GRIMES) | Greenfield | 345 kV | 600 MW | 2.8 yrs | 58.1 |
| EARLHAM | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 57.1 |
| WINTERSET JUNCTION | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 56.5 |
| UNKNOWN131419 | Substation-Adjacent | 161 kV | 100 MW | 2.8 yrs | 54.8 |
| Greenfield (EARLHAM - BOONEVILLE) | Greenfield | 161 kV | 100 MW | 2.8 yrs | 53.0 |
| Mine Site | Former Mine | — | — | 2.8 yrs | 51.6 |
| Mine Site | Former Mine | — | — | 2.8 yrs | 51.5 |
Madison County datacenter FAQ
- How many datacenter sites are in Madison County?
- 22 scored datacenter candidate sites, averaging 65.0/100 DC Readiness.
- Does Madison County offer datacenter tax incentives?
- Sales tax exemption on DC equipment for $1M+ investments; property tax phase-in for new construction.
- What is the natural-hazard risk in Madison County?
- FEMA's National Risk Index rates Madison County as "Relatively Moderate" (score 30).
- What are industrial electricity rates in Madison County?
- Average industrial electricity is 6.98¢/kWh and commercial is 10.61¢/kWh in Madison County.
Dataset updated . Screening estimates derived from public data sources.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for Madison County, Iowa. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.